package com.sky.service.impl;

import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @Author FengHuan Wang
 * @Date 2025/1/2 10:07
 * @Version 1.0
 */
@Service
public class UserServiceimpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    //微信服务接口地址
    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";


    /*微信登录功能实现*/
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenId(userLoginDTO.getCode());

        //判断openid是否为空，如果为空表示登陆失败，抛出业务异常
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user =  userMapper.getByOpenId(openid);
        //如果是新用户，就自动完成注册
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }

    /*调用微信接口获得openid*/
    public  String getOpenId(String code){
        //调用微信服务接口，获得当前微信用户的openid
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String openid = HttpClientUtil.doGet(WX_LOGIN, map);
        return openid;
    }
}
